Changes

* Algorithm software converts HFluxPerIMeasured to estimated receiver position and orientation, using direct-solution algorithm in Raab's 1981 paper or iterative solution in Raab et. al.'s 1979 paper.

* Algorithm software converts HFluxPerIMeasured to estimated receiver position and orientation, using direct-solution algorithm in Raab's 1981 paper or iterative solution in Raab et. al.'s 1979 paper.

* Frederick H. Raab, "Quasi-Static Magnetic-Field Technique for Determining Position and Orientation", IEEE Transactions on Geoscience and Remote Sensing, Vol. GE-19, No. 4, October 1981, pages 235-243, describes closed-form algorithm for concentric-dipole coil trios. Position is calculated first, directly in cartesian coordinates. Orientation is then calculated.

* Frederick H. Raab, "Quasi-Static Magnetic-Field Technique for Determining Position and Orientation", IEEE Transactions on Geoscience and Remote Sensing, Vol. GE-19, No. 4, October 1981, pages 235-243, describes closed-form algorithm for concentric-dipole coil trios.<ref name="s219"/> Position is calculated first, directly in cartesian coordinates. Orientation is then calculated.

* Frederick H. Raab, "Remote Object Position Locater", expired [[U.S. Patent 4,054,881]]. Describes frequency-multiplexed hardware.

* Frederick H. Raab, "Remote Object Position Locater", expired [[U.S. Patent 4,054,881]]. Describes frequency-multiplexed hardware.

* A 6DOF tracker using four-coil printed-circuit transmitter and receiver (optimized for academic originality) is discussed in: Peter Traneus Anderson, "A Source of Accurately Calculable Quasi-Static Magnetic Fields", dissertation presented to the Faculty of the Graduate College of the University of Vermont, October 2001, stored here as three files: [[Media:AndersonPeterDissertation.pdf]] is the main body. [[Media:AndersonPeterDissertationReadme.pdf]] contains copyright license, additional comments, and four figures that are blank in the main body. [[Media:AndersonPeterDissertationFig14r1.jpg]] is the color original photo of two of the figures. Expired U.S. Patent 1,172,017 discloses a direct-conversion radio receiver. Peter intended to include this reference as reference 16 in his dissertation, but was unable to find the patent number before Google Patents existed, so made do with existing indirect reference 16.

* A 6DOF tracker using four-coil printed-circuit transmitter and receiver (optimized for academic originality) is discussed in: Peter Traneus Anderson, "A Source of Accurately Calculable Quasi-Static Magnetic Fields", dissertation presented to the Faculty of the Graduate College of the University of Vermont, October 2001, stored here as three files: [[Media:AndersonPeterDissertation.pdf]] is the main body. [[Media:AndersonPeterDissertationReadme.pdf]] contains copyright license, additional comments, and four figures that are blank in the main body. [[Media:AndersonPeterDissertationFig14r1.jpg]] is the color original photo of two of the figures. Expired U.S. Patent 1,172,017 discloses a direct-conversion radio receiver. Peter intended to include this reference as reference 16 in his dissertation, but was unable to find the patent number before Google Patents existed, so made do with existing indirect reference 16.

* A 6DOF tracker using two transmitter coils (instead of three) can be built; Frederick Raab calls this [[6DOF_Two_State_Electromagnetic_Trackers|two-state excitation]] in his 1981 paper referenced above. Two-state trackers are severely limited, as they cannot track near the axis of the missing transmitter coil and cannot track near the plane of the two existing transmitter coils.

* A 6DOF tracker using two transmitter coils (instead of three) can be built; Frederick Raab calls this [[6DOF_Two_State_Electromagnetic_Trackers|two-state excitation]] in his 1981 paper.<ref name="s219">{{cite journal | last=Raab | first=Frederick H. | title=Quasi-Static Magnetic-Field Technique for Determining Position And Orientation | journal=IEEE Transactions on Geoscience and Remote Sensing | volume=GE-19 | issue=4 | date=1981 | issn=0196-2892 | doi=10.1109/TGRS.1981.350378 | pages=235–243}}</ref> Two-state trackers are severely limited, as they cannot track near the axis of the missing transmitter coil and cannot track near the plane of the two existing transmitter coils.

==References==

==References==